topic Re: s32k312 flexcan in S32K

s32k312 flexcan

fengba_360 — Thu, 05 Sep 2024 11:34:01 GMT

Hello, if I use FLEX CAN RX FIFO to receive CAN messages, is there a way to know whether the received data frame is a standard frame or an extended frame, my FIFO IdFilterTable is configured with both standard frame and extended frame entries。

Re: s32k312 flexcan

Senlent — Fri, 06 Sep 2024 03:21:32 GMT

Hi@fengba_360

Re: s32k312 flexcan

fengba_360 — Fri, 06 Sep 2024 08:09:08 GMT

I'm using an SDK, are there corresponding API functions?

Re: s32k312 flexcan

Senlent — Fri, 06 Sep 2024 08:33:54 GMT

Hi@fengba_360

You should know that Enhance Receiver FIFO must enable CAN FD, so I don’t know what your intention is.

This CS bit should include the IDE bit.

Re: s32k312 flexcan

fengba_360 — Mon, 09 Sep 2024 08:09:08 GMT

Actually, my goal is to identify whether a frame received through the legacy FIFO is an extended frame or a standard frame. Based on your guidance, am I correct in understanding that I can check if the received message is a standard frame or an extended frame by performing the operation cs >> 22 & 0x01 on the structure's content? thanks！

Re: s32k312 flexcan

Senlent — Mon, 09 Sep 2024 09:07:24 GMT

Hi@fengba_360

cs >> 22 & 0x01 ,yes, it's right to get IDE bit value.